Wasps made it two wins from two in the Amlin Challenge Cup with a fine nine-try 57-0 away victory against Rugby Roma on Saturday.
Scores in Italy came through Joe Ward, Dan Ward-Smith (2), Charlie Beech, Daniel Leo (2), Tom Varndell, Eoghan Hickey and Paul Sackey in what was a one-sided contest from start to finish.
Hooker Ward broke the deadlock in the sixth minute at the Stade Tre Fortane before number eight Ward-Smith grabbed the first of his brace at the end of the opening quarter.
Tony Hanks' men were in cruise control and after Beech had crossed for the third try, the visitors had secured the bonus point after 45 minutes.
England wingers Varndell and Sackey then got in on the act before Ward-Smith rounded off an impressive display with his second try and Leo sealed the victory.
Olympus Madrid 5-38 Worcester
Worcester made it a continental double for the Guinness Premiership sides with a 38-5 victory in Madrid.
Miles Benjamin and Scotland centre Alex Grove both crossed twice as Mike Ruddock's men coasted to a comfortable away win.
Madrid scored their only try through wing Matias Tudela's first-half strike but the visitors had the bonus point in the bag inside 31 minutes as Jonny Arr also crossed in the five-try success.
The Warriors ran out victors despite the loss of five key players with wing Marcel Garvey, centre Dale Rasmussen, prop Matt Mullan, lock Graham Kitchener and Shaun Ruwers all ruled out through injury.
Bucuresti 19-21 Bourgoin
Rugby Rovigo 11-76 Castres
Castres hammered Italian side Rovigo 76-11 in a 12-try blitz.
Samoan number eight Joe Tekori led the way with a hat-trick, Yoan Audrin bagged a brace while there were tries from Rodrigo Capo Ortega, Thomas Sanchou, Marc Andreu, Yannick Caballero, Thomas Bouquie, Mathieu Bonello and a penalty try.